Mac Nomad Client causing network wide dropouts

We're running an Ion Xe as Master, and at At5 Gio @5 as backup, with no problems on 3.2.10, when I try to join with a Mac Nomad client on MacOS 15.4.1 all with static IP's I need to restart the Xe before Nomad can join the party.. I can see all the other devices on the network when I ping them... It seems that after an unknown time interval, the master console no longer advertises its presence over the network to Nomad.

Secondly, introducing the Mac Nomad client renders the network unstable, causing frequent freezes on the Gio, and both the Mac and Gio lose connect at random intervals and then reconnect.. 

Am I holding it wrong? Or is this behaviour that others have seen.. at present I can't use Nomad as it's crippling the network..

Many thanks

Col

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